41 results about "Evaporation Purification" patented technology

The present invention relates to a method for removing volatile compounds from sparingly volatile fluids by means of rectification using an auxiliary and also to separation methods and chemical reactions in which sparingly volatile fluids are used, the purification of which is effected by means of rectification and using an auxiliary.

A solar water evaporation purification and decomposition device comprises a water supply line, a floating and heat insulating layer, an evaporation layer, a light-to-heat conversion and a solute blocking layer connected sequentially from bottom to top. The water supply line uses capillary action to pump water through the floating and thermal insulation layer to the evaporation layer. The light-to-heat conversion and solute barrier layer absorbs solar energy and converts it into heat, and the heated water is vaporized from the evaporation layer to water vapor. Through the light-to-heat conversion and solute barrier The pores of the layer are volatilized, and part of the water vapor is decomposed to produce hydrogen and oxygen. Since the light-to-heat conversion and solute barrier layer contains hydrophobic parts, it will not be infiltrated by water, so solar energy can only directly heat the heat-absorbing material without heating water to achieve high light intensity. Heat conversion efficiency, while preventing solutes in water from being precipitated on the surface of the membrane, to achieve seawater desalination, sewage purification and water splitting. The invention obtains a solar water evaporation purification and decomposition device with high light-to-heat conversion efficiency and high stability through the design of a hydrophilic / hydrophobic double-layer evaporation structure.

The invention discloses a production process of electronic-grade sulfuric acid and a low-temperature evaporation, purification and absorption device for production. The device includes a combined evaporation and purification device and an absorption device. The production method of electronic grade sulfuric acid using the device includes normal temperature absorption conversion, negative pressure low temperature evaporation, low temperature absorption and temperature increasing degassing, wherein the negative pressure low temperature evaporation uses the evaporation purification device And use low-temperature hot water to heat, so that the sulfur trioxide gas will evaporate without boiling; the low-temperature absorption uses the absorption device to absorb the sulfur trioxide gas with ultra-pure water or ultra-pure sulfuric acid at low temperature, and uses the absorption liquid to shock The force and the absorption of sulfur trioxide form a negative pressure in the evaporation purification device to lower the boiling point of liquid sulfur trioxide. The production method and device can ensure the safety of operation while obtaining high-quality electronic-grade sulfuric acid and ensuring the output and efficiency.